Cppcheck report - Godot - branch: master, commit: 216b3302f318c32a5dcf250293d90e47e712e8e9 (2024-12-22): editor/plugins/canvas_item_editor_plugin.h

/**************************************************************************/
/*  canvas_item_editor_plugin.h                                           */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
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/* included in all copies or substantial portions of the Software.        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
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/**************************************************************************/

#ifndef CANVAS_ITEM_EDITOR_PLUGIN_H
#define CANVAS_ITEM_EDITOR_PLUGIN_H

#include "editor/plugins/editor_plugin.h"
#include "scene/gui/box_container.h"

class AcceptDialog;
class Button;
class ButtonGroup;
class CanvasItemEditorViewport;
class ConfirmationDialog;
class EditorData;
class EditorSelection;
class EditorZoomWidget;
class HScrollBar;
class HSplitContainer;
class MenuButton;
class PanelContainer;
class StyleBoxTexture;
class ViewPanner;
class VScrollBar;
class VSeparator;
class VSplitContainer;

class CanvasItemEditorSelectedItem : public Object {
	GDCLASS(CanvasItemEditorSelectedItem, Object);

public:
	Transform2D prev_xform;
	Rect2 prev_rect;
	Vector2 prev_pivot;
	real_t prev_anchors[4] = { (real_t)0.0 };

	Transform2D pre_drag_xform;
	Rect2 pre_drag_rect;

	List<real_t> pre_drag_bones_length;
	List<Dictionary> pre_drag_bones_undo_state;

	Dictionary undo_state;

	CanvasItemEditorSelectedItem() {}
};

class CanvasItemEditor : public VBoxContainer {
	GDCLASS(CanvasItemEditor, VBoxContainer);

public:
	enum Tool {
		TOOL_SELECT,
		TOOL_LIST_SELECT,
		TOOL_MOVE,
		TOOL_SCALE,
		TOOL_ROTATE,
		TOOL_EDIT_PIVOT,
		TOOL_PAN,
		TOOL_RULER,
		TOOL_MAX
	};

	enum AddNodeOption {
		ADD_NODE,
		ADD_INSTANCE,
		ADD_PASTE,
		ADD_MOVE,
	};

private:
	enum SnapTarget {
		SNAP_TARGET_NONE = 0,
		SNAP_TARGET_PARENT,
		SNAP_TARGET_SELF_ANCHORS,
		SNAP_TARGET_SELF,
		SNAP_TARGET_OTHER_NODE,
		SNAP_TARGET_GUIDE,
		SNAP_TARGET_GRID,
		SNAP_TARGET_PIXEL
	};

	enum MenuOption {
		SNAP_USE,
		SNAP_USE_NODE_PARENT,
		SNAP_USE_NODE_ANCHORS,
		SNAP_USE_NODE_SIDES,
		SNAP_USE_NODE_CENTER,
		SNAP_USE_OTHER_NODES,
		SNAP_USE_GRID,
		SNAP_USE_GUIDES,
		SNAP_USE_ROTATION,
		SNAP_USE_SCALE,
		SNAP_RELATIVE,
		SNAP_CONFIGURE,
		SNAP_USE_PIXEL,
		SHOW_HELPERS,
		SHOW_RULERS,
		SHOW_GUIDES,
		SHOW_ORIGIN,
		SHOW_VIEWPORT,
		SHOW_POSITION_GIZMOS,
		SHOW_LOCK_GIZMOS,
		SHOW_GROUP_GIZMOS,
		SHOW_TRANSFORMATION_GIZMOS,
		LOCK_SELECTED,
		UNLOCK_SELECTED,
		GROUP_SELECTED,
		UNGROUP_SELECTED,
		ANIM_INSERT_KEY,
		ANIM_INSERT_KEY_EXISTING,
		ANIM_INSERT_POS,
		ANIM_INSERT_ROT,
		ANIM_INSERT_SCALE,
		ANIM_COPY_POSE,
		ANIM_PASTE_POSE,
		ANIM_CLEAR_POSE,
		CLEAR_GUIDES,
		VIEW_CENTER_TO_SELECTION,
		VIEW_FRAME_TO_SELECTION,
		PREVIEW_CANVAS_SCALE,
		SKELETON_MAKE_BONES,
		SKELETON_SHOW_BONES
	};

	enum DragType {
		DRAG_NONE,
		DRAG_BOX_SELECTION,
		DRAG_LEFT,
		DRAG_TOP_LEFT,
		DRAG_TOP,
		DRAG_TOP_RIGHT,
		DRAG_RIGHT,
		DRAG_BOTTOM_RIGHT,
		DRAG_BOTTOM,
		DRAG_BOTTOM_LEFT,
		DRAG_ANCHOR_TOP_LEFT,
		DRAG_ANCHOR_TOP_RIGHT,
		DRAG_ANCHOR_BOTTOM_RIGHT,
		DRAG_ANCHOR_BOTTOM_LEFT,
		DRAG_ANCHOR_ALL,
		DRAG_QUEUED,
		DRAG_MOVE,
		DRAG_MOVE_X,
		DRAG_MOVE_Y,
		DRAG_SCALE_X,
		DRAG_SCALE_Y,
		DRAG_SCALE_BOTH,
		DRAG_ROTATE,
		DRAG_PIVOT,
		DRAG_TEMP_PIVOT,
		DRAG_V_GUIDE,
		DRAG_H_GUIDE,
		DRAG_DOUBLE_GUIDE,
		DRAG_KEY_MOVE
	};

	enum GridVisibility {
		GRID_VISIBILITY_SHOW,
		GRID_VISIBILITY_SHOW_WHEN_SNAPPING,
		GRID_VISIBILITY_HIDE,
	};

	const String locked_transform_warning = TTRC("All selected CanvasItems are either invisible or locked in some way and can't be transformed.");

	bool selection_menu_additive_selection = false;

	Tool tool = TOOL_SELECT;
	Control *viewport = nullptr;
	Control *viewport_scrollable = nullptr;

	HScrollBar *h_scroll = nullptr;
	VScrollBar *v_scroll = nullptr;

	// Used for secondary menu items which are displayed depending on the currently selected node
	// (such as MeshInstance's "Mesh" menu).
	PanelContainer *context_toolbar_panel = nullptr;
	HBoxContainer *context_toolbar_hbox = nullptr;
	HashMap<Control *, VSeparator *> context_toolbar_separators;

	void _update_context_toolbar();

	Transform2D transform;
	GridVisibility grid_visibility = GRID_VISIBILITY_SHOW_WHEN_SNAPPING;
	bool show_rulers = true;
	bool show_guides = true;
	bool show_origin = true;
	bool show_viewport = true;
	bool show_helpers = false;
	bool show_position_gizmos = true;
	bool show_lock_gizmos = true;
	bool show_group_gizmos = true;
	bool show_transformation_gizmos = true;

	real_t zoom = 1.0;
	Point2 view_offset;
	Point2 previous_update_view_offset;

	bool selected_from_canvas = false;

	// Defaults are defined in clear().
	Point2 grid_offset;
	Point2 grid_step;
	Vector2i primary_grid_step;
	int grid_step_multiplier = 0;

	real_t snap_rotation_step = 0.0;
	real_t snap_rotation_offset = 0.0;
	real_t snap_scale_step = 0.0;
	bool smart_snap_active = false;
	bool grid_snap_active = false;

	bool snap_node_parent = true;
	bool snap_node_anchors = true;
	bool snap_node_sides = true;
	bool snap_node_center = true;
	bool snap_other_nodes = true;
	bool snap_guides = true;
	bool snap_rotation = false;
	bool snap_scale = false;
	bool snap_relative = false;
	// Enable pixel snapping even if pixel snap rendering is disabled in the Project Settings.
	// This results in crisper visuals by preventing 2D nodes from being placed at subpixel coordinates.
	bool snap_pixel = true;

	bool key_pos = true;
	bool key_rot = true;
	bool key_scale = false;

	bool pan_pressed = false;
	Vector2 temp_pivot = Vector2(INFINITY, INFINITY);

	bool ruler_tool_active = false;
	Point2 ruler_tool_origin;
	Point2 node_create_position;

	MenuOption last_option;

	struct _SelectResult {
		CanvasItem *item = nullptr;
		real_t z_index = 0;
		bool has_z = true;
		_FORCE_INLINE_ bool operator<(const _SelectResult &p_rr) const {
			return has_z && p_rr.has_z ? p_rr.z_index < z_index : p_rr.has_z;
		}
	};
	Vector<_SelectResult> selection_results;
	Vector<_SelectResult> selection_results_menu;

	struct _HoverResult {
		Point2 position;
		Ref<Texture2D> icon;
		String name;
	};
	Vector<_HoverResult> hovering_results;

	struct BoneList {
		Transform2D xform;
		real_t length = 0;
		uint64_t last_pass = 0;
	};

	uint64_t bone_last_frame = 0;

	struct BoneKey {
		ObjectID from;
		ObjectID to;
		_FORCE_INLINE_ bool operator<(const BoneKey &p_key) const {
			if (from == p_key.from) {
				return to < p_key.to;
			} else {
				return from < p_key.from;
			}
		}
	};

	HashMap<BoneKey, BoneList> bone_list;
	MenuButton *skeleton_menu = nullptr;

	struct PoseClipboard {
		Vector2 pos;
		Vector2 scale;
		real_t rot = 0;
		ObjectID id;
	};
	List<PoseClipboard> pose_clipboard;

	Button *select_button = nullptr;

	Button *move_button = nullptr;
	Button *scale_button = nullptr;
	Button *rotate_button = nullptr;

	Button *list_select_button = nullptr;
	Button *pivot_button = nullptr;
	Button *pan_button = nullptr;

	Button *ruler_button = nullptr;

	Button *smart_snap_button = nullptr;
	Button *grid_snap_button = nullptr;
	MenuButton *snap_config_menu = nullptr;
	PopupMenu *smartsnap_config_popup = nullptr;

	Button *lock_button = nullptr;
	Button *unlock_button = nullptr;

	Button *group_button = nullptr;
	Button *ungroup_button = nullptr;

	MenuButton *view_menu = nullptr;
	PopupMenu *grid_menu = nullptr;
	PopupMenu *theme_menu = nullptr;
	PopupMenu *gizmos_menu = nullptr;
	HBoxContainer *animation_hb = nullptr;
	MenuButton *animation_menu = nullptr;

	Button *key_loc_button = nullptr;
	Button *key_rot_button = nullptr;
	Button *key_scale_button = nullptr;
	Button *key_insert_button = nullptr;
	Button *key_auto_insert_button = nullptr;

	PopupMenu *selection_menu = nullptr;
	PopupMenu *add_node_menu = nullptr;

	Control *top_ruler = nullptr;
	Control *left_ruler = nullptr;

	Point2 drag_start_origin;
	DragType drag_type = DRAG_NONE;
	Point2 drag_from;
	Point2 drag_to;
	Point2 drag_rotation_center;
	List<CanvasItem *> drag_selection;
	int dragged_guide_index = -1;
	Point2 dragged_guide_pos;
	bool is_hovering_h_guide = false;
	bool is_hovering_v_guide = false;

	bool updating_value_dialog = false;
	Transform2D original_transform;

	Point2 box_selecting_to;

	Ref<StyleBoxTexture> select_sb;
	Ref<Texture2D> select_handle;
	Ref<Texture2D> anchor_handle;

	Ref<Shortcut> drag_pivot_shortcut;
	Ref<Shortcut> set_pivot_shortcut;
	Ref<Shortcut> multiply_grid_step_shortcut;
	Ref<Shortcut> divide_grid_step_shortcut;

	Ref<ViewPanner> panner;
	bool warped_panning = true;
	void _pan_callback(Vector2 p_scroll_vec, Ref<InputEvent> p_event);
	void _zoom_callback(float p_zoom_factor, Vector2 p_origin, Ref<InputEvent> p_event);

	bool _is_node_locked(const Node *p_node) const;
	bool _is_node_movable(const Node *p_node, bool p_popup_warning = false);
	void _find_canvas_items_at_pos(const Point2 &p_pos, Node *p_node, Vector<_SelectResult> &r_items, const Transform2D &p_parent_xform = Transform2D(), const Transform2D &p_canvas_xform = Transform2D());
	void _get_canvas_items_at_pos(const Point2 &p_pos, Vector<_SelectResult> &r_items, bool p_allow_locked = false);

	void _find_canvas_items_in_rect(const Rect2 &p_rect, Node *p_node, List<CanvasItem *> *r_items, const Transform2D &p_parent_xform = Transform2D(), const Transform2D &p_canvas_xform = Transform2D());
	bool _select_click_on_item(CanvasItem *item, Point2 p_click_pos, bool p_append);

	ConfirmationDialog *snap_dialog = nullptr;

	CanvasItem *ref_item = nullptr;

	void _save_canvas_item_state(const List<CanvasItem *> &p_canvas_items, bool save_bones = false);
	void _restore_canvas_item_state(const List<CanvasItem *> &p_canvas_items, bool restore_bones = false);
	void _commit_canvas_item_state(const List<CanvasItem *> &p_canvas_items, const String &action_name, bool commit_bones = false);

	Vector2 _anchor_to_position(const Control *p_control, Vector2 anchor);
	Vector2 _position_to_anchor(const Control *p_control, Vector2 position);

	void _prepare_view_menu();
	void _popup_callback(int p_op);
	bool updating_scroll = false;
	void _update_scroll(real_t);
	void _update_scrollbars();
	void _snap_changed();
	void _selection_result_pressed(int);
	void _selection_menu_hide();
	void _add_node_pressed(int p_result);
	void _adjust_new_node_position(Node *p_node);
	void _reset_create_position();
	void _update_editor_settings();
	bool _is_grid_visible() const;
	void _prepare_grid_menu();
	void _on_grid_menu_id_pressed(int p_id);

public:
	enum ThemePreviewMode {
		THEME_PREVIEW_PROJECT,
		THEME_PREVIEW_EDITOR,
		THEME_PREVIEW_DEFAULT,

		THEME_PREVIEW_MAX // The number of options for enumerating.
	};

private:
	ThemePreviewMode theme_preview = THEME_PREVIEW_PROJECT;
	void _switch_theme_preview(int p_mode);

	List<CanvasItem *> _get_edited_canvas_items(bool p_retrieve_locked = false, bool p_remove_canvas_item_if_parent_in_selection = true, bool *r_has_locked_items = nullptr) const;
	Rect2 _get_encompassing_rect_from_list(const List<CanvasItem *> &p_list);
	void _expand_encompassing_rect_using_children(Rect2 &r_rect, const Node *p_node, bool &r_first, const Transform2D &p_parent_xform = Transform2D(), const Transform2D &p_canvas_xform = Transform2D(), bool include_locked_nodes = true);
	Rect2 _get_encompassing_rect(const Node *p_node);

	Object *_get_editor_data(Object *p_what);

	void _insert_animation_keys(bool p_location, bool p_rotation, bool p_scale, bool p_on_existing);

	void _keying_changed();

	virtual void shortcut_input(const Ref<InputEvent> &p_ev) override;

	void _draw_text_at_position(Point2 p_position, const String &p_string, Side p_side);
	void _draw_margin_at_position(int p_value, Point2 p_position, Side p_side);
	void _draw_percentage_at_position(real_t p_value, Point2 p_position, Side p_side);
	void _draw_straight_line(Point2 p_from, Point2 p_to, Color p_color);

	void _draw_smart_snapping();
	void _draw_rulers();
	void _draw_guides();
	void _draw_focus();
	void _draw_grid();
	void _draw_ruler_tool();
	void _draw_control_anchors(Control *control);
	void _draw_control_helpers(Control *control);
	void _draw_selection();
	void _draw_axis();
	void _draw_invisible_nodes_positions(Node *p_node, const Transform2D &p_parent_xform = Transform2D(), const Transform2D &p_canvas_xform = Transform2D());
	void _draw_locks_and_groups(Node *p_node, const Transform2D &p_parent_xform = Transform2D(), const Transform2D &p_canvas_xform = Transform2D());
	void _draw_hover();
	void _draw_message();

	void _draw_viewport();

	bool _gui_input_anchors(const Ref<InputEvent> &p_event);
	bool _gui_input_move(const Ref<InputEvent> &p_event);
	bool _gui_input_open_scene_on_double_click(const Ref<InputEvent> &p_event);
	bool _gui_input_scale(const Ref<InputEvent> &p_event);
	bool _gui_input_pivot(const Ref<InputEvent> &p_event);
	bool _gui_input_resize(const Ref<InputEvent> &p_event);
	bool _gui_input_rotate(const Ref<InputEvent> &p_event);
	bool _gui_input_select(const Ref<InputEvent> &p_event);
	bool _gui_input_ruler_tool(const Ref<InputEvent> &p_event);
	bool _gui_input_zoom_or_pan(const Ref<InputEvent> &p_event, bool p_already_accepted);
	bool _gui_input_rulers_and_guides(const Ref<InputEvent> &p_event);
	bool _gui_input_hover(const Ref<InputEvent> &p_event);

	void _gui_input_viewport(const Ref<InputEvent> &p_event);
	void _update_cursor();
	void _update_lock_and_group_button();

	void _selection_changed();
	void _focus_selection(int p_op);
	void _reset_drag();

	void _project_settings_changed();

	SnapTarget snap_target[2];
	Transform2D snap_transform;
	void _snap_if_closer_float(
			const real_t p_value,
			real_t &r_current_snap, SnapTarget &r_current_snap_target,
			const real_t p_target_value, const SnapTarget p_snap_target,
			const real_t p_radius = 10.0);
	void _snap_if_closer_point(
			Point2 p_value,
			Point2 &r_current_snap, SnapTarget (&r_current_snap_target)[2],
			Point2 p_target_value, const SnapTarget p_snap_target,
			const real_t rotation = 0.0,
			const real_t p_radius = 10.0);
	void _snap_other_nodes(
			const Point2 p_value,
			const Transform2D p_transform_to_snap,
			Point2 &r_current_snap, SnapTarget (&r_current_snap_target)[2],
			const SnapTarget p_snap_target, List<const CanvasItem *> p_exceptions,
			const Node *p_current);

	VBoxContainer *controls_vb = nullptr;
	Button *button_center_view = nullptr;
	EditorZoomWidget *zoom_widget = nullptr;
	void _update_zoom(real_t p_zoom);
	void _shortcut_zoom_set(real_t p_zoom);
	void _zoom_on_position(real_t p_zoom, Point2 p_position = Point2());
	void _button_toggle_smart_snap(bool p_status);
	void _button_toggle_grid_snap(bool p_status);
	void _button_tool_select(int p_index);

	HSplitContainer *left_panel_split = nullptr;
	HSplitContainer *right_panel_split = nullptr;
	VSplitContainer *bottom_split = nullptr;

	void _set_owner_for_node_and_children(Node *p_node, Node *p_owner);

	friend class CanvasItemEditorPlugin;

protected:
	void _notification(int p_what);

	static void _bind_methods();

	static CanvasItemEditor *singleton;

public:
	enum SnapMode {
		SNAP_GRID = 1 << 0,
		SNAP_GUIDES = 1 << 1,
		SNAP_PIXEL = 1 << 2,
		SNAP_NODE_PARENT = 1 << 3,
		SNAP_NODE_ANCHORS = 1 << 4,
		SNAP_NODE_SIDES = 1 << 5,
		SNAP_NODE_CENTER = 1 << 6,
		SNAP_OTHER_NODES = 1 << 7,

		SNAP_DEFAULT = SNAP_GRID | SNAP_GUIDES | SNAP_PIXEL,
	};

	String message;

	Point2 snap_point(Point2 p_target, unsigned int p_modes = SNAP_DEFAULT, unsigned int p_forced_modes = 0, const CanvasItem *p_self_canvas_item = nullptr, const List<CanvasItem *> &p_other_nodes_exceptions = List<CanvasItem *>());
	real_t snap_angle(real_t p_target, real_t p_start = 0) const;

	Transform2D get_canvas_transform() const { return transform; }

	static CanvasItemEditor *get_singleton() { return singleton; }
	Dictionary get_state() const;
	void set_state(const Dictionary &p_state);
	void clear();

	void add_control_to_menu_panel(Control *p_control);
	void remove_control_from_menu_panel(Control *p_control);

	void add_control_to_left_panel(Control *p_control);
	void remove_control_from_left_panel(Control *p_control);

	void add_control_to_right_panel(Control *p_control);
	void remove_control_from_right_panel(Control *p_control);

	VSplitContainer *get_bottom_split();

	Control *get_viewport_control() { return viewport; }

	Control *get_controls_container() { return controls_vb; }

	void update_viewport();

	Tool get_current_tool() { return tool; }
	void set_current_tool(Tool p_tool);

	void edit(CanvasItem *p_canvas_item);

	void focus_selection();
	void center_at(const Point2 &p_pos);

	virtual CursorShape get_cursor_shape(const Point2 &p_pos) const override;

	ThemePreviewMode get_theme_preview() const { return theme_preview; }

	EditorSelection *editor_selection = nullptr;

	CanvasItemEditor();
};

class CanvasItemEditorPlugin : public EditorPlugin {
	GDCLASS(CanvasItemEditorPlugin, EditorPlugin);

	CanvasItemEditor *canvas_item_editor = nullptr;

protected:
	void _notification(int p_what);

public:
	virtual String get_plugin_name() const override { return "2D"; }
	bool has_main_screen() const override { return true; }
	virtual void edit(Object *p_object) override;
	virtual bool handles(Object *p_object) const override;
	virtual void make_visible(bool p_visible) override;
	virtual Dictionary get_state() const override;
	virtual void set_state(const Dictionary &p_state) override;
	virtual void clear() override;

	CanvasItemEditor *get_canvas_item_editor() { return canvas_item_editor; }

	CanvasItemEditorPlugin();
	~CanvasItemEditorPlugin();
};

class CanvasItemEditorViewport : public Control {
	GDCLASS(CanvasItemEditorViewport, Control);

	// The type of node that will be created when dropping texture into the viewport.
	String default_texture_node_type;
	// Node types that are available to select from when dropping texture into viewport.
	Vector<String> texture_node_types;

	Vector<String> selected_files;
	Node *target_node = nullptr;
	Point2 drop_pos;

	CanvasItemEditor *canvas_item_editor = nullptr;
	Control *preview_node = nullptr;
	AcceptDialog *accept = nullptr;
	AcceptDialog *texture_node_type_selector = nullptr;
	Label *label = nullptr;
	Label *label_desc = nullptr;
	Ref<ButtonGroup> button_group;

	void _on_mouse_exit();
	void _on_select_texture_node_type(Object *selected);
	void _on_change_type_confirmed();
	void _on_change_type_closed();

	void _create_preview(const Vector<String> &files) const;
	void _remove_preview();

	bool _cyclical_dependency_exists(const String &p_target_scene_path, Node *p_desired_node) const;
	bool _is_any_texture_selected() const;
	void _create_texture_node(Node *p_parent, Node *p_child, const String &p_path, const Point2 &p_point);
	void _create_audio_node(Node *p_parent, const String &p_path, const Point2 &p_point);
	bool _create_instance(Node *p_parent, const String &p_path, const Point2 &p_point);
	void _perform_drop_data();
	void _show_texture_node_type_selector();
	void _update_theme();

protected:
	void _notification(int p_what);

public:
	virtual bool can_drop_data(const Point2 &p_point, const Variant &p_data) const override;
	virtual void drop_data(const Point2 &p_point, const Variant &p_data) override;

	CanvasItemEditorViewport(CanvasItemEditor *p_canvas_item_editor);
<--- Class 'CanvasItemEditorViewport' has a constructor with 1 argument that is not explicit. [+]
Class 'CanvasItemEditorViewport' has a constructor with 1 argument that is not explicit. Such constructors should in general be explicit for type safety reasons. Using the explicit keyword in the constructor means some mistakes when using the class can be avoided.
	~CanvasItemEditorViewport();
};

#endif // CANVAS_ITEM_EDITOR_PLUGIN_H